Have done 6000 miles now and only used 95RON once on a full fill up on an empty tank, never again. Engine note dropped, was a different car.
Now only use Shell V Power or Tesco 99.
Just been to Wales and back, 450 miles could have done it on a single tank. Computer read 44.5mpg and I was cruising at 75mph the whole time, virtually all motorway.
My MkV GT TDi 140bhp would do 50 mpg for the same journey.
Amazing engine, it has loosened up nicely now, quicker as well, particularly mid range.